Mumbai Local Train Puzzle I visit my mother or mother in law daily

I visit my mother or mother in law daily
mother lives at Churchgate station and mother in law lives at Borivli station
I live some station in between When i reach station I get into first available train
Even though there are regular trains to and from for Borivli and Churchgate every 4 minutes i find my self visiting my mother in law three times more than my mother
 
how is it possible ?